Abstract
The aim of the present study was to monitor implant stability after sinus floor elevation with two biomaterials during the first six months of healing by resonance frequency analysis (RFA), and how physico-chemical properties affect the implant stability quotient (ISQ) at the placement and healing sites. Bilateral maxillary sinus augmentation was performed in 10 patients in a split-mouth design using a bobine HA (BBM) as a control and porcine HA (PBM). Six months after sinus lifting, 60 implants were placed in the posterior maxilla. The ISQ was recorded on the day of surgery from RFA at T1 (baseline), T2 (three months), and T3 (six months). Statistically significant differences were found in the ISQ values during the evaluation period. The ISQ (baseline) was 63.8 ± 2.97 for BBM and 62.6 ± 2.11 for PBM. The ISQ (T2) was ~73.5 ± 4.21 and 67 ± 4.99, respectively. The ISQ (T3) was ~74.65 ± 2.93 and 72.9 ± 2.63, respectively. All of the used HAs provide osseointegration and statistical increases in the ISQ at baseline, T2 and T3 (follow-up), respectively. The BBM, sintered at high temperature with high crystallinity and low porosity, presented higher stability, which demonstrates that variations in the physico-chemical properties of a bone substitute material clearly influence implant stability.
Highlights
The edentulous ridge in the posterior maxilla often presents a limited bone volume due to both a lack of alveolar bone after ridge remodeling and maxillary sinus pneumatization [1]
The results of this study showed that the implants placed and delayed with the maxillary sinus lift with different biomaterials presented distinct implant stability quotient (ISQ), with statistically significant differences
The HA of a bovine origin sintered with high crystallinity, low porosity, high density, and a larger granule size presents better stability, which demonstrates that variations in the physico-chemical properties of a bone substitute material clearly influence implant stability
Summary
The edentulous ridge in the posterior maxilla often presents a limited bone volume due to both a lack of alveolar bone after ridge remodeling and maxillary sinus pneumatization [1]. E.g., using shorter implants, are beginning to be investigated [4,5,6], any available scientific evidence is modest and insufficient to conclude that the success of sinus lift procedures in bone with a residual height between 4 mm and 9 mm will be better, or not, than when short implants are used [7,8]. Maxillary sinus floor grafting has become the most common surgical intervention when increasing alveolar bone height before placing endosseous dental implants in the posterior maxilla [9].
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